GEOS-5826 backport to 2.3.x
Merge pull request #258 from mbarto/geos_5826_23x

GEOS-5826 backport to 2.3.x
Move CSS module to extensions
Refactor docs/sources to reflect css change to extension status
Hook up CSS artifact descriptor for extension packaging
Restore accidentally deleted CSS docs

Conflicts:
	doc/en/user/source/extensions/css/css_demo_page.png
	doc/en/user/source/extensions/css/examples.rst
	doc/en/user/source/extensions/css/filters.rst
	doc/en/user/source/extensions/css/index.rst
	doc/en/user/source/extensions/css/metadata.rst
	doc/en/user/source/extensions/css/multivalues.rst
	doc/en/user/source/extensions/css/properties.rst
	doc/en/user/source/extensions/css/styled-marks.rst
	doc/en/user/source/extensions/css/tutorial.rst
	doc/en/user/source/extensions/css/values.rst
	doc/en/user/source/extensions/index.rst
initial Dutch i18n contribution
updated German i18n, fixed java/resource location for nl
updated Korean i18n files
Change baseman from metacarta to demo.opengeo.org ne:ne (GEOS-5848)

Signed-off-by: Jody Garnett <jody.garnett@gmail.com>
Removing duplicated class from GEoTools, this should fix the build
Fix erroneous mark examples from CSS documentation.

Fixes GEOS-5908.
initially added Chinese properties files Thanks to hanchao
GEOS-5564, updated LocalWorkspaceURLMangler to handle path with multiple components
[GEOS-5881] LayerGroup page does not mandate the specification of the CRS
GEOS-5842, List of drives is invisible for Adding store
Merge pull request #278 from geosolutions-it/2.3.x

GEOS-5842, List of drives is invisible for Adding store
GEOS-4762, WCS should force usage of imageread
Merge pull request #280 from geosolutions-it/2.3.x

GEOS-4762, WCS should force usage of imageread
GEOS-5896, Document uconfiguration of GDAL_DRIVER_PATH on Windows